Muffler for explosive-engines.



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Patented July 61,1909.-

G. A. JACKSON.

MUPFLER PoR EXPLosIvE ENGINES.

APPLICATION FILED 1320.14, 1908.

AUMTED sTATEs PATENT oEEi'oE.

GEORGE A. JACKSON, OF SEWIGKLIGY, PENN MILLER DICKSON, ONE-FOURTH l.`0 DKNOW/TILES, ALL Ol" SE\\/'lt`lil.lfl1', PEN

MUFFLER FOR XPLOSIVFl-EN GINES.

No. 927,248. Specification of Letters Patent. Patented July 6, 1909.

Application filed December 14, 1908. Serial No. 467,370`

To all 4whom it may concern:

Be it known that i. (irEoneE A. JACKSON, a citizen of the United States,residing at Sevficliley, in the county of Allegheny and State ofPennsylvania, have invented certain neuland useful Improvements inMuftlers for EXplosive-llngines, of which the following is aspeciiication, reference being had'therein to the accompanying.drawing.

My invention consists of an improvement in inultlers for explosiveengines and it has for its object to provide means for eliminating thenoise of the exhaust from engines of this class so as to permit theexhaust or waste gases to escape into the atmosphere at or aboutatmospheric pressure and vpractically noiselessly. v

The invention consists of one or a series of tclescoping cylinders having per'loratious arranged to provide for successive outward expansivepassage otl the gases in tortuous paths, from a central throttlinginutller pipe, adapted to be connected withthe exhaust pipe of theengine.

In the drawings illustrating the invention, Figure 1 is a longitudinalcent-ral view through a muliier made in accordance with my invention.Fig. 2 a cross sectional view taken on the broken line Il. II. ofFig. 1. KK

2 represents the inner end of the exhaust pipe extension which by itsterminal threads is adapted to be connected with the exhaust pipe of anexplosive engine, which pipe 2 is contracted at its inner end 3 and isconnected by sleeve coupling 4 with a similar contracted end 5 of a pipe6 forming a continuation of pipe 2, for convenience in assembling. Thesetwo pipe sections may however, be consolidated in single pipe having areduced throltling middle portion.

7 and S represent heads of the inuftler chamber secured centrally at theends of pipes and G respectively by means `of a lock nut 9 and washer 10and preferably intervening packing 1l, and at the other end by innerloch nut 12 and au outer cap 13, closing end of pipe 6, or in any othersuitable manner, as by connecting rods or bolts 37. As thus constructedit will be seen that the heads 7 and S may be tightly clamped\baclm'ardly .in @reversed direction at about by the terminal' nuts andcap, or with such supplemental rods,so as to hold the entire structurerigidly together.

Concentrically arranged upon pipes 2 and 6 and between heads 7 and 8,are a series -oi shells 14, 15 and 16, as shown in the draw!` ing, or ofany other number desired. The inner shells 14 and 15 are held concentricwith the central pipe by setting their ends in annular grooves 17 on theinner sides Ot' heads 7 and 8, While the outer shell 16 may be suitablyheld by terminal Hanges 1S, as clearly shown. lipe sections 2 and G arcperforated by annular-ly arranged series of outlet ports, closelyassembled and ot' a sutlicient size, say one-eighth inch in diameter, topermit ,the escape outwardly to cavity l5) of-part of the products ocombustion entering into the tube 2. -As shown, the tirst series of suchperforations 20 is arranged slantingly .for-k ward at an angle of about45, beyond which is a series of similar openings 21 sloping the sameangle, while beyond series 21 is a third series 22, similar to series20; beyond, which is a series 23, similar to series 21; beyond which isa final series 24, similar to the series 20 and 22. Betweenv each ofsaid series or between as many pairs of the re-` versed series as.' maybe desired, are interposed additional series of ports 25 extendingstraight out through the 'Walls as shown. By this arrangement, theproducts of combustion entering pipe 2 from the engine will passforwardly and partially through the -throttling reduced terminals 3 and5, eX-

panding bcyond'such reduced portions inthe enlarged interior of pipe (3.A considerable portion of the gases, however, will be baiied backnardlyfrom the shoulders at the throttlcd terminal of pipe 2, and will escapeoutwardly through ports 20, 21, 23, 24 and 2o in the directions of saidports. Thus some ofv the gases upon entering will pass treely outthrough ports 20, 22 aud and seine gases will. be reversed and passbackwardly through ports 21 and 23, in a direction transverse v of thecurrents escaping through the other ports, whilebetween the series ofreversed ports, some et' the gases g I i ceases .ports 25. The pipe 6 issimilarly provided described. i with alternately vdisposed series ofexhaust lt will be understoodv that the device may l 1 ports 26, 27, 28and4 29 with intervening bemade in any desired size or proportions 5straight ports 30, whereby the gases from the i and l do not wish to belimited to the exact .interun- Of Said pipe will likewise escape iconstruction or arrangement or number of 70 'therefrom in opposingdirections into the i parts, as these may be changed or varied by'surrounding cavity 19. The e'ect of such l the skilled mechanic to suitdifferent condidistribution of the gases through the varil tions of use.ons series of ports is to tend," by the conlict- Having described myinvention what l ving currents, to counteract the force of each claim is75 other and produce a complete cominingling within chamber 19 and suchaction. is 1 1pyplementary to the initial deadening eil'ect ol thethrottling of the' gases in the reduced necks 3 and 5. i

v-.willvpass directly out at right angles through lanade and constructedinthe manner above 65 1. .A muffler for explosive engines consisting ofan exhaust pipe extension having a contracted portion between its endsand vprovided with annularly arranged outlet ports at each side thereof,substantially as 80 .The gases, in addition to their cross conset forth.flicting currents will expand within theen.- 2. A houiller for explosiveengines conlarged area or cavity of chamber 19, and sisting of anexhaust pipe extension having a 2.0 good results may be had byexhaustingto contracted portion between its ends, and

the atmosphere from shell 14.. the purprovided with annularly arrangedoutlet 85 'pose of still further producing the mixing portsextending`angularly through the shell effect to reduce the pressure to a generalof the pipe, substantially as .set forth.

' u 3. A muiiier for `explosive engines consistthe next succeeding shell1d being provided ing of an exhaust pipe extension having a with aseries of annularly arrangedexhaust i contracted portion between itsends, and pro- 90 ports 31 about midway between the series vided withannularly arranged outlet ports 24' and 26 and likewise provided withone or extending singularly through the shell of the more annular rowsof ports 32, 32, at each pipe, the ports at each side of the middlecon-` end ofthe shellf' The object in so arranging tracted portion beingdisposed outwardly these ports is that they will be out of aline andbackwardl'y toward the middle con` 95 ment as much as possible with theports of tracted portion, substantially as set forth.

tubes 2 and Gpso as to cause vthe gases to pass d." A mufiier forexplosive engines contortuously through chamber 1S) to escape sisting'ofan exhaust .pipe extension having 35 mitwardly through the ports ofshell 1d into a contracted portion between its ends and the next cavitybetween shell 14s and shell provided with annularly arranged outlet 10015. Shell/l5 is likewise provided with anports and a surrounding shellhaving similar nul-arly arranged series of exhaust ports 34, outletports, substantially as set forth.

hat each side of its middle portion and off- 5. A niuiiler for explosiveengines conset between the ports 31 and ports 32 so as `sisting` of anexhaust pipe extension reduced to produce the ,ame tortuous travel. rlheh1 areal between its ends and provided with 105 gases inpassing througheach shellvinto the annularly?arranged outlet ports, and a'surnextsucceeding;- chamber will, in addition to ri'iunding hcil having;similar outlet por-ts their constant change of direction, continue instaggered .arranoenient with relation to to expand until they entercavity 35 between the ports of the. ex. aust pipe, substantially vI'shell 15 and outermost shell 1G. Said shell as set forth. v

' I16 is finallyy provided with an annular series 6. A niuiller forexplosive engines conof 'exhaust ports 36 arranged. about midway sistingof an exhaust pipe extension reduced 'of @its length and between portsdi, 34, vin area between its ends'and provided with through which thegases will finally pass to annularly arranged outlet ports, and seriesthe, atmosphere. The resultant effect ofthe' of coneentrically arrangedsurrounding v115 tortuous or staggered travel of the gases in' shellshaving similar ports, substantially as their passage from the inner pipefinally to set forth. I

the atmosphere, in combination with the suc ',7. A mutiler 'forexplosive engines concessive expansive action and the constant -isistingof an exhaust pipe extension reduced 'baiiiingy by the Walls, results inthe @wes in area between its ends and provided with 120 average, Iprefer a pluralitv of such shells,

d finally escaping into the atmosphere at-pracannularly arranged outletports arranged in A A t'ically. uniform pressure, and ,at a pressureannular series and at opposing angles, and a so reduced that it'willapproximate or only surrounding shell having-annularly arranged Yslightly exceed that of the atmosphere. Al outlet ports, substantiall asset forth. no1se and vibration is substantlall elimi- 8. A muftler forexp osive engines con- 125 nated, avoiding the annoyance of t eordisistingof an exhaust pipe extension reduced,

i nary-exhaust, and in practice I have found in area between its endsandprovided 1- the device to give' excellent results wheil iwannularlyarranged outl t ports arranged 1n @weee A 3 i annular series and atoppesmg angles, and a series of concentrealy arranged Surrounding shellshaving series of amuflarly a1'- renged outlet ports, substantially asforth.

9. The combination with an exhaust pipe extension having a reduced aree..between its ends and ennulmly zumnged Series of Outet ports disposedzit @ppc-Sieg anglesy 10 of :L plurality o: concentric surrounding,

shells having fammlarly arranged perte*7 closing heads therefor, andmeansfor securing the parte together, Substantially as set forth.

In. testimony whereof I ax my signature L5 in presence of two Witnesses.A

GEORGE A. JACKSON Witnesses:

C. M. CLARKE, CEAS. S. LEPLEY.

